firewire: Use atomic_t's for serial numbers.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>

Use atomic_inc_return.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index f785b1005284..3f8661a52acc 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -367,9 +367,9 @@ void
 fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
                    struct device *device)
 {
-        static int index;
+        static atomic_t index = ATOMIC_INIT(-1);
 
-        card->index = index++;
+        card->index = atomic_inc_return(&index);
         card->driver = driver;
         card->device = device;
         card->current_tlabel = 0;